10bII+

Purchased to use on my MacBook to calculate IRR/NPV problems. Half the time when trying to calculate IRR, it gives me an error. Putting the same keystrokes in on an actual calculator gives me the right answer. App does not work half the time, and would not recommend.

I use this constantly and find it so helpful to not have to carry around my physical 10BII+. Seriously, this is a very cost effective solution for regular users. I’m very happy to pay a 1 time fee of around $5 or $6 especially compared to the subscription models. If I want just a “regular, free” calculator I use the one built in to my phone. Great product developers! 👏Please keep it up!

Continues to throw an error message just about every time you use it. Sometimes it freezes the phone. Very glitchy, but I wish it would work properly because it’s a great concept and easier than carrying the physical calculator.